1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f9f620f9074227ec28c4902f88ad3056abcd912ba59925e569fe350577b48. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30e8f706-db72-406b-a474-a6ca7efa58ef.json and https://artists.proofprofile.net/proofs/artist/30e8f706-db72-406b-a474-a6ca7efa58ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86cb0b6ca6394a3073dd5d0187bff768ea870607a8f986bccee6ec9ee128400. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62005223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440abda83c0d163c5cc05959cdcb551221bd062c38aef31bdd9832946bc84215. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2106088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6748d297eb79ee7d455cee5be697fec0cf6121b4aa2102079287e9e4942b3a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2139062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e6a32087095faede5d6317ff0a2395c863146945e57d38d1cad980a1cb939. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2101444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b50b407cad90e4d3d428e3f74be5ab08614f795c6e5cf13904808927c7e8ecb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2153856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306d3ee734b6b726c3e51ab48f06cc280645390e8d6689a4450ae7b4598074c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2168626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20bc92fefa62a451c3b78fdec139cf0d391a7e012bc59e54a640a05590d9361. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2186871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe301b1892a2c843e94369018ef46d94a61db636e4ab9ec158d29ce95eaac045. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2216361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0911446617c0340d2caa165ff08e4aa74f231dc87035d45a9ab1dd673b5b1ff. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2224744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f5ef76d687a83d25219b1ab0d980e8b65e0ede66f16f8541dbd28b48a851dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2259628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32219a17c5a47fa7d50e1ff542ea8e7fd17abce9282b83e9801294a0fe75ad4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9Z62300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5fc58ea4a446353cb60f1f1cb5d0173a426e53a8a271dba313ca7cf3addf2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85215b92ca85e2656fd2a015ec69808e1e84093a26a154b842c6a2379e6bd75. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329ffb218ea229c63c32c88f454fc0be5ddfb030969d3b29ac4c00bc07fcd410. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361e4c2c5a6b870139d72d5367dbd9d9006b2bcf10e41497649baed07dd6029. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5fc58ea4a446353cb60f1f1cb5d0173a426e53a8a271dba313ca7cf3addf2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85215b92ca85e2656fd2a015ec69808e1e84093a26a154b842c6a2379e6bd75. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US23A1596321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34abd94e65af6e4c05329fe4998c3e251cae687fcb711a55e5a513a293431b10. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2173688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7ce387bd755274402a3e743c3a1d2570a6811f317cdf66afd7407983a8015c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022391829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7ce387bd755274402a3e743c3a1d2570a6811f317cdf66afd7407983a8015c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022391829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc12dccf2b0c367abf46a02c917a0891a2a5d42d1d0fbd1e389ec47d1d42ed4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022391120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de86245ef100f7fec69bdc053b7bdb89910fcf3192bd62c4c0f12d47188aa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ022390400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4758f93e2006a941cde666f6bfcc89ae01a5a22d06cddd1d8578d3cf4bba748a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2232008.